you flee that environment. you come into the united states. you go to school. you get a scholarship. you have friends. but somewhere in that leadened, deadened heart, head of yours, it's still not good enough. there is a cause that's more important, not survival, and i'm not sure we'll ever be able to comprehend that. we need to try because it may give us potential to identify other people. here we have a rather remarkable journey these two young men took. a journey literally millions have taken. and they've contributed to the united states. their contribution was death and destruction. of innocent people. we may never understand, rationalize, how. >> as you reference the uncle who pleaded with his nephew, dzhokhar, give yourself up, give yourself up. and of course that is the fervent wish of law enforcement officials for a number of reasons. one is for the survival of dzhokhar tsarnaev because there is a manhunt for him and he will not escape that network of law enforcement at some point. this will not come to a good end. but also from a law enforcement perspe